/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraParameterStore.h
Returns the associatedFNiagaraVariablefor the passed data interface if it exists in the store. Null if not.
const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) * FindVariable ( const [UNiagaraDataInterface](API\Plugins\Niagara\UNiagaraDataInterface) * Interface ) const